Improvement in looks foe cae dooes



' @uiten .faire @anni @frn GEORGE B. F; COOPER, OF NEW ALBANY, INDIANA.

Letters Pare-nr No. 64,635, dated May 14, 1867.

IMPROVEMENT INLOGKS FOR GAR DOORS, te.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, GEORGE B. F. COOPER, of New Albany, in the county of Floyd, and State of\ Indiana, have invented a new and useful Improvement in Locks; and I do hereby declare that the following is a full, clear,-and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is au inside view of my improved lock adapted to a sliding door for a freight car or other purpose.

Figure 2 is an outside view of the same attached to a door and locked.

Figure 3 is a detached View of the tumbler-s of the lock.

Figure 4 is an inside view of my improved lock adapted'te a swinging door.

' Figure 5 is an outside view of the s ame attached to a door. i

Figure 6 is a view of the key detached..

Similar letters of reference indicate 'corresponding parts.

This invention relates to an improvement in locks more especially designed for railroad freight cars, but applicable to warehouses and other purposes, and capable of modification for use on either sliding or swinging doors. -The distinguishing feature of my 'improved lock consists in the combination of two bolts, one of which locks the door without using a key, while the other secures and .keeps it locked, so that it cannot be unlocked without applying a key. The lock is fastened to the door, and the bolt which catches in a staple or other holdfast on the casing may be locked by sliding the other bolt behind it by hand, or it will furnish a reliable fastening without locking. The parts of the lock are all simple and durable, and, although it is locked without a key, it cannot be opened without using One, nor picked by any but an expert burglar with proper tools, so thatV for practical purposes in. general it is a safe and effective fastening.

Figures 1 and 2 represent a lock adapted to a.' sliding door on a freight ear. The casing A. may be made of cast or wroughtiron, and the bolts and other parts as5usual. The lock is attached to the'door in such position that the tumblers a a, which are pivoted atene end in the bolt B, shall fall. by gravity and catch at the other end in a notch or shoulder upon a guide and check-block, when the said bolt B is pushed forward to lock the door, by means of a pivoted thumb-pawl or elbow-lever, c, one end of which bea-rs against the rear end of the bolt B, and the other end projects through the side of the lock to be pressed upon for pushing the bolt. The bolt B is placed so as to slide between the guide-blocks b b1 b2, and is held in place, when it is pushed back to unlock the door, by a flat spring, e, on the top which bears against the inside of the casing. Between the guide-block b2 and the lock-casing is a loose vertical sliding block or bar G, to the upper end of which is attached a spiral spring, al, which runs up into a cavity in the casing and abuts at its upper end against the inside. The lower end-of the bar C is pressed bythe spiral spring cl against the upper side of a. horizontal bolt, D, which is pivoted at one end within the casing and projects through theV casing at the other end, and which is provided with' a shouldered head toi catch in a staple as it drops in the usual way when the door is locked, as is shown in iig. 2. When a door is closed and the bolt D catches in the staple it is madev fast by pressing on the thumb-pawl c, which pushes the bolt B forward over the uppei` end of the sliding bar-C, where it is held firmly in place and prevented from returning by the dropping Of the ends of the tumbler-s a a into the shoulder or notch on the guide and check-block b. The bolt a cannot then be raised from the staple which catches and holds it without applying a key, g, to lift the tumblers a a out of the notch in block IJ and carry back the bolt B from the top of the sliding bar C. After this has been done, however, the bol't D may be raised out of the catch by hand and the door opened and, as is manifest, the catch-bolt D will serve as an ordinary fastening by the force of gravity and the action of the spiral spring d, without being locked. Figs. 4 and 5 represent a lock adapted to a swinging door, which is modified in construction but does not differ in principle of action from that already described,.

the only important change being in dispensing with an intermediate sliding bar, C, and pushing the bolt B directly upon the upper end of a vertical sliding catch-bolt, D.

Having thus described the construction and use of my invention, what I claim as new, and desire to secure by Letters Patent, is

I claim the catch-bolt D, in combination with the sliding 'bolt B, operated by the thumb-pawl c, to lock or Secure the fastening without employing a key, arranged substantially as herein described.

GEO. 'n F. COOPER.

Witnesses:

JARED C. JoeELYN, JN0. H. MASTEN. 

